#include "global.h"
#include "sdcard.h"

#if (USE_SDCARD == 1)

SD_Error SD_errno = (SD_Error)0;
int SD_step = 0;

#define NULL	0
#define SDIO_STATIC_FLAGS               ((u32)0x000005FF)
#define SDIO_CMD0TIMEOUT                ((u32)0x00002710)
#define SDIO_FIFO_Address               ((u32)0x40018080)

/* Mask for errors Card Status R1 (OCR Register) */
#define SD_OCR_ADDR_OUT_OF_RANGE        ((u32)0x80000000)
#define SD_OCR_ADDR_MISALIGNED          ((u32)0x40000000)
#define SD_OCR_BLOCK_LEN_ERR            ((u32)0x20000000)
#define SD_OCR_ERASE_SEQ_ERR            ((u32)0x10000000)
#define SD_OCR_BAD_ERASE_PARAM          ((u32)0x08000000)
#define SD_OCR_WRITE_PROT_VIOLATION     ((u32)0x04000000)
#define SD_OCR_LOCK_UNLOCK_FAILED       ((u32)0x01000000)
#define SD_OCR_COM_CRC_FAILED           ((u32)0x00800000)
#define SD_OCR_ILLEGAL_CMD              ((u32)0x00400000)
#define SD_OCR_CARD_ECC_FAILED          ((u32)0x00200000)
#define SD_OCR_CC_ERROR                 ((u32)0x00100000)
#define SD_OCR_GENERAL_UNKNOWN_ERROR    ((u32)0x00080000)
#define SD_OCR_STREAM_READ_UNDERRUN     ((u32)0x00040000)
#define SD_OCR_STREAM_WRITE_OVERRUN     ((u32)0x00020000)
#define SD_OCR_CID_CSD_OVERWRIETE       ((u32)0x00010000)
#define SD_OCR_WP_ERASE_SKIP            ((u32)0x00008000)
#define SD_OCR_CARD_ECC_DISABLED        ((u32)0x00004000)
#define SD_OCR_ERASE_RESET              ((u32)0x00002000)
#define SD_OCR_AKE_SEQ_ERROR            ((u32)0x00000008)
#define SD_OCR_ERRORBITS                ((u32)0xFDFFE008)

/* Masks for R6 Response */
#define SD_R6_GENERAL_UNKNOWN_ERROR     ((u32)0x00002000)
#define SD_R6_ILLEGAL_CMD               ((u32)0x00004000)
#define SD_R6_COM_CRC_FAILED            ((u32)0x00008000)

#define SD_VOLTAGE_WINDOW_SD            ((u32)0x80100000)
#define SD_HIGH_CAPACITY                ((u32)0x40000000)
#define SD_STD_CAPACITY                 ((u32)0x00000000)
#define SD_CHECK_PATTERN                ((u32)0x000001AA)

#define SD_MAX_VOLT_TRIAL               ((u32)0x0000FFFF)
#define SD_ALLZERO                      ((u32)0x00000000)

#define SD_WIDE_BUS_SUPPORT		((u32)0x00040000)
#define SD_SINGLE_BUS_SUPPORT	((u32)0x00010000)
#define SD_CARD_LOCKED			((u32)0x02000000)
#define SD_CARD_PROGRAMMING		((u32)0x00000007)
#define SD_CARD_RECEIVING		((u32)0x00000006)
#define SD_DATATIMEOUT			((u32)0x000FFFFF)
#define SD_0TO7BITS				((u32)0x000000FF)
#define SD_8TO15BITS			((u32)0x0000FF00)
#define SD_16TO23BITS			((u32)0x00FF0000)
#define SD_24TO31BITS			((u32)0xFF000000)
#define SD_MAX_DATA_LENGTH		((u32)0x01FFFFFF)

#define SD_HALFFIFO				((u32)0x00000008)
#define SD_HALFFIFOBYTES		((u32)0x00000020)

/* Command Class Supported */
#define SD_CCCC_LOCK_UNLOCK		((u32)0x00000080)
#define SD_CCCC_WRITE_PROT		((u32)0x00000040)
#define SD_CCCC_ERASE			((u32)0x00000020)

/* Following commands are SD Card Specific commands.
   SDIO_APP_CMD should be sent before sending these commands.
   */
#define SDIO_SEND_IF_COND		((u32)0x00000008)

#define SDIO_INIT_CLK_DIV		((u8)0xB2)
#define SDIO_TRANSFER_CLK_DIV	((u8)0x10)// ((u8)0x1)

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
u32 CardType = SDIO_STD_CAPACITY_SD_CARD_V1_1;
u32 CSD_Tab[4], CID_Tab[4], RCA = 0;
u32 DeviceMode = SD_DMA_MODE;
u32 TotalNumberOfBytes = 0, StopCondition = 0;
u32 *SrcBuffer, *DestBuffer;
volatile SD_Error TransferError = SD_OK;
vu32 TransferEnd = 0;
vu32 NumberOfBytes = 0;
SDIO_InitTypeDef SDIO_InitStructure;
SDIO_CmdInitTypeDef SDIO_CmdInitStructure;
SDIO_DataInitTypeDef SDIO_DataInitStructure;

/* Private function prototypes -----------------------------------------------*/
SD_Error CmdError(void);
SD_Error CmdResp1Error(u8 cmd);
SD_Error CmdResp7Error(void);
SD_Error CmdResp3Error(void);
SD_Error CmdResp2Error(void);
SD_Error CmdResp6Error(u8 cmd, u16 *prca);
SD_Error SDEnWideBus(FunctionalState NewState);
SD_Error IsCardProgramming(u8 *pstatus);
SD_Error FindSCR(u16 rca, u32 *pscr);
u8 convert_from_bytes_to_power_of_two(u16 NumberOfBytes);
void GPIO_Configuration(void);
void DMA_TxConfiguration(u32 *BufferSRC, u32 BufferSize);
void DMA_RxConfiguration(u32 *BufferDST, u32 BufferSize);

/*******************************************************************************
* Function Name  : SD_Init
* Description    : Initializes the SD Card and put it into StandBy State (Ready
*                  for data transfer).
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_Init(void)
{
	SD_Error errorstatus = SD_OK;

	/* Configure SDIO interface GPIO */
	GPIO_Configuration();

	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_SDIO, ENABLE);
	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);

	SDIO_DeInit();
	errorstatus = SD_PowerON();
	if (errorstatus != SD_OK)
	{
		/* CMD Response TimeOut (wait for CMDSENT flag) */
		return errorstatus;
	}

	errorstatus = SD_InitializeCards();
	if (errorstatus != SD_OK)
	{
		/* CMD Response TimeOut (wait for CMDSENT flag) */
		return errorstatus;
	}

	/* Configure the SDIO peripheral */
	/* HCLK = 72 MHz, SDIOCLK = 72 MHz, SDIO_CK = HCLK/(2 + 1) = 24 MHz */
	SDIO_InitStructure.SDIO_ClockDiv = SDIO_INIT_CLK_DIV; //SDIO_TRANSFER_CLK_DIV;
	SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
	SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;
	SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;
	SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_1b;
	SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;
	SDIO_Init(&SDIO_InitStructure);

	return errorstatus;
}

/*******************************************************************************
* Function Name  : SD_PowerON
* Description    : Enquires cards about their operating voltage and configures
*                  clock controls.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_PowerON(void)
{
	SD_Error errorstatus = SD_OK;
	u32 response = 0, count = 0;
	bool validvoltage = false;
	u32 SDType = SD_STD_CAPACITY;

	/* Power ON Sequence -------------------------------------------------------*/
	/* Configure the SDIO peripheral */
	SDIO_InitStructure.SDIO_ClockDiv = SDIO_INIT_CLK_DIV; /* HCLK = 72MHz, SDIOCLK = 72MHz, SDIO_CK = HCLK/(178 + 2) = 400 KHz */
	SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
	SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;
	SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;
	SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_1b;
	SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;
	SDIO_Init(&SDIO_InitStructure);

	/* Set Power State to ON */
	SDIO_SetPowerState(SDIO_PowerState_ON);

	/* Enable SDIO Clock */
	SDIO_ClockCmd(ENABLE);

	/* CMD0: GO_IDLE_STATE -------------------------------------------------------*/
	/* No CMD response required */
	SDIO_CmdInitStructure.SDIO_Argument = 0x0;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_GO_IDLE_STATE;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_No;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdError();

	if (errorstatus != SD_OK)
	{
		/* CMD Response TimeOut (wait for CMDSENT flag) */
		return(errorstatus);
	}

	/* CMD8: SEND_IF_COND --------------------------------------------------------*/
	/* Send CMD8 to verify SD card interface operating condition */
	/* Argument: - [31:12]: Reserved (shall be set to '0')
				 - [11:8]: Supply Voltage (VHS) 0x1 (Range: 2.7-3.6 V)
				 - [7:0]: Check Pattern (recommended 0xAA) */
	/* CMD Response: R7 */
	SDIO_CmdInitStructure.SDIO_Argument = SD_CHECK_PATTERN;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_IF_COND;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp7Error();

	if (errorstatus == SD_OK)
	{
		CardType = SDIO_STD_CAPACITY_SD_CARD_V2_0; /* SD Card 2.0 */
		SDType = SD_HIGH_CAPACITY;
	}
	else
	{
		/* CMD55 */
		SDIO_CmdInitStructure.SDIO_Argument = 0x00;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);
		errorstatus = CmdResp1Error(SDIO_APP_CMD);
	}
	/* CMD55 */
	SDIO_CmdInitStructure.SDIO_Argument = 0x00;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);
	errorstatus = CmdResp1Error(SDIO_APP_CMD);

	/* If errorstatus is Command TimeOut, it is a MMC card */
	/* If errorstatus is SD_OK it is a SD card: SD card 2.0 (voltage range mismatch)
	   or SD card 1.x */
	if (errorstatus == SD_OK)
	{
		/* SD CARD */
		/* Send ACMD41 SD_APP_OP_COND with Argument 0x80100000 */
		while ((!validvoltage) && (count < SD_MAX_VOLT_TRIAL))
		{

			/* SEND CMD55 APP_CMD with RCA as 0 */
			SDIO_CmdInitStructure.SDIO_Argument = 0x00;
			SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);

			errorstatus = CmdResp1Error(SDIO_APP_CMD);

			if (errorstatus != SD_OK)
			{
				return(errorstatus);
			}
			SDIO_CmdInitStructure.SDIO_Argument = SD_VOLTAGE_WINDOW_SD | SDType;
			SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SD_APP_OP_COND;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);

			errorstatus = CmdResp3Error();
			if (errorstatus != SD_OK)
			{
				return(errorstatus);
			}

			response = SDIO_GetResponse(SDIO_RESP1);
			validvoltage = (bool)(((response >> 31) == 1) ? 1 : 0);
			count++;
		}
		if (count >= SD_MAX_VOLT_TRIAL)
		{
			errorstatus = SD_INVALID_VOLTRANGE;
			return(errorstatus);
		}

		if (response &= SD_HIGH_CAPACITY)
		{
			CardType = SDIO_HIGH_CAPACITY_SD_CARD;
		}

	}/* else MMC Card */

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_PowerOFF
* Description    : Turns the SDIO output signals off.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_PowerOFF(void)
{
	SD_Error errorstatus = SD_OK;

	/* Set Power State to OFF */
	SDIO_SetPowerState(SDIO_PowerState_OFF);

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_InitializeCards
* Description    : Intialises all cards or single card as the case may be.
*                  Card(s) come into standby state.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_InitializeCards(void)
{
	SD_Error errorstatus = SD_OK;
	u16 rca = 0x01;

	if (SDIO_GetPowerState() == SDIO_PowerState_OFF)
	{
		errorstatus = SD_REQUEST_NOT_APPLICABLE;
		return(errorstatus);
	}

	if (SDIO_SECURE_DIGITAL_IO_CARD != CardType)
	{
		/* Send CMD2 ALL_SEND_CID */
		SDIO_CmdInitStructure.SDIO_Argument = 0x0;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_ALL_SEND_CID;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Long;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp2Error();

		if (SD_OK != errorstatus)
		{
			return(errorstatus);
		}

		CID_Tab[0] = SDIO_GetResponse(SDIO_RESP1);
		CID_Tab[1] = SDIO_GetResponse(SDIO_RESP2);
		CID_Tab[2] = SDIO_GetResponse(SDIO_RESP3);
		CID_Tab[3] = SDIO_GetResponse(SDIO_RESP4);
	}
	if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType) || (SDIO_SECURE_DIGITAL_IO_COMBO_CARD == CardType)
		|| (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
	{
		/* Send CMD3 SET_REL_ADDR with argument 0 */
		/* SD Card publishes its RCA. */
		SDIO_CmdInitStructure.SDIO_Argument = 0x00;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_REL_ADDR;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp6Error(SDIO_SET_REL_ADDR, &rca);

		if (SD_OK != errorstatus)
		{
			return(errorstatus);
		}
	}

	if (SDIO_SECURE_DIGITAL_IO_CARD != CardType)
	{
		RCA = rca;

		/* Send CMD9 SEND_CSD with argument as card's RCA */
		SDIO_CmdInitStructure.SDIO_Argument = (u32)(rca << 16);
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_CSD;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Long;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp2Error();

		if (SD_OK != errorstatus)
		{
			return(errorstatus);
		}

		CSD_Tab[0] = SDIO_GetResponse(SDIO_RESP1);
		CSD_Tab[1] = SDIO_GetResponse(SDIO_RESP2);
		CSD_Tab[2] = SDIO_GetResponse(SDIO_RESP3);
		CSD_Tab[3] = SDIO_GetResponse(SDIO_RESP4);
	}

	errorstatus = SD_OK; /* All cards get intialized */

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_GetCardInfo
* Description    : Returns information about specific card.
* Input          : cardinfo : pointer to a SD_CardInfo structure
*                  that contains all SD card information.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_GetCardInfo(SD_CardInfo *cardinfo)
{
	SD_Error errorstatus = SD_OK;
	u8 tmp = 0;

	cardinfo->CardType = (u8)CardType;
	cardinfo->RCA = (u16)RCA;

	/* Byte 0 */
	tmp = (u8)((CSD_Tab[0] & 0xFF000000) >> 24);
	cardinfo->SD_csd.CSDStruct = (tmp & 0xC0) >> 6;
	cardinfo->SD_csd.SysSpecVersion = (tmp & 0x3C) >> 2;
	cardinfo->SD_csd.Reserved1 = tmp & 0x03;

	/* Byte 1 */
	tmp = (u8)((CSD_Tab[0] & 0x00FF0000) >> 16);
	cardinfo->SD_csd.TAAC = tmp;

	/* Byte 2 */
	tmp = (u8)((CSD_Tab[0] & 0x0000FF00) >> 8);
	cardinfo->SD_csd.NSAC = tmp;

	/* Byte 3 */
	tmp = (u8)(CSD_Tab[0] & 0x000000FF);
	cardinfo->SD_csd.MaxBusClkFrec = tmp;

	/* Byte 4 */
	tmp = (u8)((CSD_Tab[1] & 0xFF000000) >> 24);
	cardinfo->SD_csd.CardComdClasses = tmp << 4;

	/* Byte 5 */
	tmp = (u8)((CSD_Tab[1] & 0x00FF0000) >> 16);
	cardinfo->SD_csd.CardComdClasses |= (tmp & 0xF0) >> 4;
	cardinfo->SD_csd.RdBlockLen = tmp & 0x0F;

	/* Byte 6 */
	tmp = (u8)((CSD_Tab[1] & 0x0000FF00) >> 8);
	cardinfo->SD_csd.PartBlockRead = (tmp & 0x80) >> 7;
	cardinfo->SD_csd.WrBlockMisalign = (tmp & 0x40) >> 6;
	cardinfo->SD_csd.RdBlockMisalign = (tmp & 0x20) >> 5;
	cardinfo->SD_csd.DSRImpl = (tmp & 0x10) >> 4;
	cardinfo->SD_csd.Reserved2 = 0; /* Reserved */

	if ((CardType == SDIO_STD_CAPACITY_SD_CARD_V1_1) || (CardType == SDIO_STD_CAPACITY_SD_CARD_V2_0))
	{
		cardinfo->SD_csd.DeviceSize = (tmp & 0x03) << 10;

		/* Byte 7 */
		tmp = (u8)(CSD_Tab[1] & 0x000000FF);
		cardinfo->SD_csd.DeviceSize |= (tmp) << 2;

		/* Byte 8 */
		tmp = (u8)((CSD_Tab[2] & 0xFF000000) >> 24);
		cardinfo->SD_csd.DeviceSize |= (tmp & 0xC0) >> 6;

		cardinfo->SD_csd.MaxRdCurrentVDDMin = (tmp & 0x38) >> 3;
		cardinfo->SD_csd.MaxRdCurrentVDDMax = (tmp & 0x07);

		/* Byte 9 */
		tmp = (u8)((CSD_Tab[2] & 0x00FF0000) >> 16);
		cardinfo->SD_csd.MaxWrCurrentVDDMin = (tmp & 0xE0) >> 5;
		cardinfo->SD_csd.MaxWrCurrentVDDMax = (tmp & 0x1C) >> 2;
		cardinfo->SD_csd.DeviceSizeMul = (tmp & 0x03) << 1;
		/* Byte 10 */
		tmp = (u8)((CSD_Tab[2] & 0x0000FF00) >> 8);
		cardinfo->SD_csd.DeviceSizeMul |= (tmp & 0x80) >> 7;

		cardinfo->CardCapacity = (cardinfo->SD_csd.DeviceSize + 1);
		cardinfo->CardCapacity *= (1 << (cardinfo->SD_csd.DeviceSizeMul + 2));
		cardinfo->CardBlockSize = 1 << (cardinfo->SD_csd.RdBlockLen);
		cardinfo->CardCapacity *= cardinfo->CardBlockSize;
	}
	else if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
	{
		/* Byte 7 */
		tmp = (u8)(CSD_Tab[1] & 0x000000FF);
		cardinfo->SD_csd.DeviceSize = (tmp & 0x3F) << 16;

		/* Byte 8 */
		tmp = (u8)((CSD_Tab[2] & 0xFF000000) >> 24);

		cardinfo->SD_csd.DeviceSize |= (tmp << 8);

		/* Byte 9 */
		tmp = (u8)((CSD_Tab[2] & 0x00FF0000) >> 16);

		cardinfo->SD_csd.DeviceSize |= (tmp);

		/* Byte 10 */
		tmp = (u8)((CSD_Tab[2] & 0x0000FF00) >> 8);

		cardinfo->CardCapacity = (cardinfo->SD_csd.DeviceSize + 1) * 512 * 1024;
		cardinfo->CardBlockSize = 512;
	}


	cardinfo->SD_csd.EraseGrSize = (tmp & 0x40) >> 6;
	cardinfo->SD_csd.EraseGrMul = (tmp & 0x3F) << 1;

	/* Byte 11 */
	tmp = (u8)(CSD_Tab[2] & 0x000000FF);
	cardinfo->SD_csd.EraseGrMul |= (tmp & 0x80) >> 7;
	cardinfo->SD_csd.WrProtectGrSize = (tmp & 0x7F);

	/* Byte 12 */
	tmp = (u8)((CSD_Tab[3] & 0xFF000000) >> 24);
	cardinfo->SD_csd.WrProtectGrEnable = (tmp & 0x80) >> 7;
	cardinfo->SD_csd.ManDeflECC = (tmp & 0x60) >> 5;
	cardinfo->SD_csd.WrSpeedFact = (tmp & 0x1C) >> 2;
	cardinfo->SD_csd.MaxWrBlockLen = (tmp & 0x03) << 2;

	/* Byte 13 */
	tmp = (u8)((CSD_Tab[3] & 0x00FF0000) >> 16);
	cardinfo->SD_csd.MaxWrBlockLen |= (tmp & 0xC0) >> 6;
	cardinfo->SD_csd.WriteBlockPaPartial = (tmp & 0x20) >> 5;
	cardinfo->SD_csd.Reserved3 = 0;
	cardinfo->SD_csd.ContentProtectAppli = (tmp & 0x01);

	/* Byte 14 */
	tmp = (u8)((CSD_Tab[3] & 0x0000FF00) >> 8);
	cardinfo->SD_csd.FileFormatGrouop = (tmp & 0x80) >> 7;
	cardinfo->SD_csd.CopyFlag = (tmp & 0x40) >> 6;
	cardinfo->SD_csd.PermWrProtect = (tmp & 0x20) >> 5;
	cardinfo->SD_csd.TempWrProtect = (tmp & 0x10) >> 4;
	cardinfo->SD_csd.FileFormat = (tmp & 0x0C) >> 2;
	cardinfo->SD_csd.ECC = (tmp & 0x03);

	/* Byte 15 */
	tmp = (u8)(CSD_Tab[3] & 0x000000FF);
	cardinfo->SD_csd.CSD_CRC = (tmp & 0xFE) >> 1;
	cardinfo->SD_csd.Reserved4 = 1;


	/* Byte 0 */
	tmp = (u8)((CID_Tab[0] & 0xFF000000) >> 24);
	cardinfo->SD_cid.ManufacturerID = tmp;

	/* Byte 1 */
	tmp = (u8)((CID_Tab[0] & 0x00FF0000) >> 16);
	cardinfo->SD_cid.OEM_AppliID = tmp << 8;

	/* Byte 2 */
	tmp = (u8)((CID_Tab[0] & 0x000000FF00) >> 8);
	cardinfo->SD_cid.OEM_AppliID |= tmp;

	/* Byte 3 */
	tmp = (u8)(CID_Tab[0] & 0x000000FF);
	cardinfo->SD_cid.ProdName1 = tmp << 24;

	/* Byte 4 */
	tmp = (u8)((CID_Tab[1] & 0xFF000000) >> 24);
	cardinfo->SD_cid.ProdName1 |= tmp << 16;

	/* Byte 5 */
	tmp = (u8)((CID_Tab[1] & 0x00FF0000) >> 16);
	cardinfo->SD_cid.ProdName1 |= tmp << 8;

	/* Byte 6 */
	tmp = (u8)((CID_Tab[1] & 0x0000FF00) >> 8);
	cardinfo->SD_cid.ProdName1 |= tmp;

	/* Byte 7 */
	tmp = (u8)(CID_Tab[1] & 0x000000FF);
	cardinfo->SD_cid.ProdName2 = tmp;

	/* Byte 8 */
	tmp = (u8)((CID_Tab[2] & 0xFF000000) >> 24);
	cardinfo->SD_cid.ProdRev = tmp;

	/* Byte 9 */
	tmp = (u8)((CID_Tab[2] & 0x00FF0000) >> 16);
	cardinfo->SD_cid.ProdSN = tmp << 24;

	/* Byte 10 */
	tmp = (u8)((CID_Tab[2] & 0x0000FF00) >> 8);
	cardinfo->SD_cid.ProdSN |= tmp << 16;

	/* Byte 11 */
	tmp = (u8)(CID_Tab[2] & 0x000000FF);
	cardinfo->SD_cid.ProdSN |= tmp << 8;

	/* Byte 12 */
	tmp = (u8)((CID_Tab[3] & 0xFF000000) >> 24);
	cardinfo->SD_cid.ProdSN |= tmp;

	/* Byte 13 */
	tmp = (u8)((CID_Tab[3] & 0x00FF0000) >> 16);
	cardinfo->SD_cid.Reserved1 |= (tmp & 0xF0) >> 4;
	cardinfo->SD_cid.ManufactDate = (tmp & 0x0F) << 8;

	/* Byte 14 */
	tmp = (u8)((CID_Tab[3] & 0x0000FF00) >> 8);
	cardinfo->SD_cid.ManufactDate |= tmp;

	/* Byte 15 */
	tmp = (u8)(CID_Tab[3] & 0x000000FF);
	cardinfo->SD_cid.CID_CRC = (tmp & 0xFE) >> 1;
	cardinfo->SD_cid.Reserved2 = 1;

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_EnableWideBusOperation
* Description    : Enables wide bus opeartion for the requeseted card if
*                  supported by card.
* Input          : WideMode: Specifies the SD card wide bus mode.
*                     This parameter can be one of the following values:
*                       - SDIO_BusWide_8b: 8-bit data transfer (Only for MMC)
*                       - SDIO_BusWide_4b: 4-bit data transfer
*                       - SDIO_BusWide_1b: 1-bit data transfer
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_EnableWideBusOperation(u32 WideMode)
{
	SD_Error errorstatus = SD_OK;

	/* MMC Card doesn't support this feature */
	if (SDIO_MULTIMEDIA_CARD == CardType)
	{
		errorstatus = SD_UNSUPPORTED_FEATURE;
		return(errorstatus);
	}
	else if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
	{
		if (SDIO_BusWide_8b == WideMode)
		{
			errorstatus = SD_UNSUPPORTED_FEATURE;
			return(errorstatus);
		}
		else if (SDIO_BusWide_4b == WideMode)
		{
			errorstatus = SDEnWideBus(ENABLE);

			if (SD_OK == errorstatus)
			{
				/* Configure the SDIO peripheral */
				SDIO_InitStructure.SDIO_ClockDiv = SDIO_TRANSFER_CLK_DIV;
				SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
				SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;
				SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;
				SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_4b;
				SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;
				SDIO_Init(&SDIO_InitStructure);
			}
		}
		else
		{
			errorstatus = SDEnWideBus(DISABLE);

			if (SD_OK == errorstatus)
			{
				/* Configure the SDIO peripheral */
				SDIO_InitStructure.SDIO_ClockDiv = SDIO_TRANSFER_CLK_DIV;
				SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
				SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;
				SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;
				SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_1b;
				SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;
				SDIO_Init(&SDIO_InitStructure);
			}
		}
	}

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_SetDeviceMode
* Description    : Sets device mode whether to operate in Polling, Interrupt or
*                  DMA mode.
* Input          : Mode: Specifies the Data Transfer mode.
*                     This parameter can be one of the following values:
*                       - SD_DMA_MODE: Data transfer using DMA.
*                       - SD_INTERRUPT_MODE: Data transfer using interrupts.
*                       - SD_POLLING_MODE: Data transfer using flags.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_SetDeviceMode(u32 Mode)
{
	SD_Error errorstatus = SD_OK;

	if ((Mode == SD_DMA_MODE) || (Mode == SD_INTERRUPT_MODE) || (Mode == SD_POLLING_MODE))
	{
		DeviceMode = Mode;
	}
	else
	{
		errorstatus = SD_INVALID_PARAMETER;
	}
	return(errorstatus);

}

/*******************************************************************************
* Function Name  : SD_SelectDeselect
* Description    : Selects od Deselects the corresponding card.
* Input          : addr: Address of the Card to be selected.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_SelectDeselect(u32 addr)
{
	SD_Error errorstatus = SD_OK;

	/* Send CMD7 SDIO_SEL_DESEL_CARD */
	SDIO_CmdInitStructure.SDIO_Argument = addr;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEL_DESEL_CARD;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SDIO_SEL_DESEL_CARD);

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_ReadBlock
* Description    : Allows to read one block from a specified address in a card.
* Input          : - addr: Address from where data are to be read.
*                  - readbuff: pointer to the buffer that will contain the
*                    received data
*                  - blocksize: the SD card Data block size.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_ReadBlock(u32 addr, u32 *readbuff, u16 BlockSize)
{
	SD_Error errorstatus = SD_OK;
	u32 count = 0, *tempbuff = readbuff;
	u8 power = 0;

	if (NULL == readbuff)
	{
		errorstatus = SD_INVALID_PARAMETER;
		return(errorstatus);
	}

	TransferError = SD_OK;
	TransferEnd = 0;
	TotalNumberOfBytes = 0;

	/* Clear all DPSM configuration */
	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DataLength = 0;
	SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_1b;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Disable;
	SDIO_DataConfig(&SDIO_DataInitStructure);
	SDIO_DMACmd(DISABLE);

	if (SDIO_GetResponse(SDIO_RESP1) & SD_CARD_LOCKED)
	{
		errorstatus = SD_LOCK_UNLOCK_FAILED;
		return(errorstatus);
	}

	if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
	{
		BlockSize = 512;
		addr /= 512;
	}
	if ((BlockSize > 0) && (BlockSize <= 2048) && ((BlockSize & (BlockSize - 1)) == 0))
	{
		power = convert_from_bytes_to_power_of_two(BlockSize);

		/* Set Block Size for Card */
		SDIO_CmdInitStructure.SDIO_Argument = (u32)BlockSize;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_BLOCKLEN;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SDIO_SET_BLOCKLEN);

		if (SD_OK != errorstatus)
		{
			return(errorstatus);
		}
	}
	else
	{
		errorstatus = SD_INVALID_PARAMETER;
		return(errorstatus);
	}

	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DataLength = BlockSize;
	SDIO_DataInitStructure.SDIO_DataBlockSize = (u32)power << 4;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToSDIO;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
	SDIO_DataConfig(&SDIO_DataInitStructure);

	TotalNumberOfBytes = BlockSize;
	StopCondition = 0;
	DestBuffer = readbuff;

	/* Send CMD17 READ_SINGLE_BLOCK */
	SDIO_CmdInitStructure.SDIO_Argument = (u32)addr;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_READ_SINGLE_BLOCK;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SDIO_READ_SINGLE_BLOCK);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}
	/* In case of single block transfer, no need of stop transfer at all.*/
	if (DeviceMode == SD_POLLING_MODE)
	{
		/* Polling mode */
		while (!(SDIO->STA &(SDIO_FLAG_RXOVERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_DBCKEND | SDIO_FLAG_STBITERR)))
		{
			if (SDIO_GetFlagStatus(SDIO_FLAG_RXFIFOHF) != RESET)
			{
				for (count = 0; count < 8; count++)
				{
					*(tempbuff + count) = SDIO_ReadData();
				}
				tempbuff += 8;
			}
		}

		if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET)
		{
			SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT);
			errorstatus = SD_DATA_TIMEOUT;
			return(errorstatus);
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET)
		{
			SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL);
			errorstatus = SD_DATA_CRC_FAIL;
			return(errorstatus);
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET)
		{
			SDIO_ClearFlag(SDIO_FLAG_RXOVERR);
			errorstatus = SD_RX_OVERRUN;
			return(errorstatus);
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET)
		{
			SDIO_ClearFlag(SDIO_FLAG_STBITERR);
			errorstatus = SD_START_BIT_ERR;
			return(errorstatus);
		}
		while (SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET)
		{
			*tempbuff = SDIO_ReadData();
			tempbuff++;
		}

		/* Clear all the static flags */
		SDIO_ClearFlag(SDIO_STATIC_FLAGS);
	}
	else if (DeviceMode == SD_INTERRUPT_MODE)
	{
		SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_RXFIFOHF | SDIO_IT_STBITERR, ENABLE);
		while ((TransferEnd == 0) && (TransferError == SD_OK))
		{
		}
		if (TransferError != SD_OK)
		{
			return(TransferError);
		}
	}
	else if (DeviceMode == SD_DMA_MODE)
	{
		SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR, ENABLE);
		SDIO_DMACmd(ENABLE);
		DMA_RxConfiguration(readbuff, BlockSize);
		while (DMA_GetFlagStatus(DMA2_FLAG_TC4) == RESET)
		{
		}
	}
	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_ReadMultiBlocks
* Description    : Allows to read blocks from a specified address  in a card.
* Input          : - addr: Address from where data are to be read.
*                  - readbuff: pointer to the buffer that will contain the
*                    received data.
*                  - BlockSize: the SD card Data block size.
*                  - NumberOfBlocks: number of blocks to be read.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_ReadMultiBlocks(u32 addr, u32 *readbuff, u16 BlockSize, u32 NumberOfBlocks)
{
	SD_Error errorstatus = SD_OK;
	u32 count = 0, *tempbuff = readbuff;
	u8 power = 0;

	if (NULL == readbuff)
	{
		errorstatus = SD_INVALID_PARAMETER;
		return(errorstatus);
	}

	TransferError = SD_OK;
	TransferEnd = 0;
	TotalNumberOfBytes = 0;

	/* Clear all DPSM configuration */
	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DataLength = 0;
	SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_1b;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Disable;
	SDIO_DataConfig(&SDIO_DataInitStructure);
	SDIO_DMACmd(DISABLE);

	if (SDIO_GetResponse(SDIO_RESP1) & SD_CARD_LOCKED)
	{
		errorstatus = SD_LOCK_UNLOCK_FAILED;
		return(errorstatus);
	}

	if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
	{
		BlockSize = 512;
		addr /= 512;
	}

	if ((BlockSize > 0) && (BlockSize <= 2048) && (0 == (BlockSize & (BlockSize - 1))))
	{
		power = convert_from_bytes_to_power_of_two(BlockSize);

		/* Set Block Size for Card */
		SDIO_CmdInitStructure.SDIO_Argument = (u32)BlockSize;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_BLOCKLEN;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SDIO_SET_BLOCKLEN);

		if (SD_OK != errorstatus)
		{
			return(errorstatus);
		}
	}
	else
	{
		errorstatus = SD_INVALID_PARAMETER;
		return(errorstatus);
	}

	if (NumberOfBlocks > 1)
	{
		/* Common to all modes */
		if (NumberOfBlocks * BlockSize > SD_MAX_DATA_LENGTH)
		{
			errorstatus = SD_INVALID_PARAMETER;
			return(errorstatus);
		}

		TotalNumberOfBytes = NumberOfBlocks * BlockSize;
		StopCondition = 1;
		DestBuffer = readbuff;

		SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
		SDIO_DataInitStructure.SDIO_DataLength = NumberOfBlocks * BlockSize;
		SDIO_DataInitStructure.SDIO_DataBlockSize = (u32)power << 4;
		SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToSDIO;
		SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
		SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
		SDIO_DataConfig(&SDIO_DataInitStructure);

		/* Send CMD18 READ_MULT_BLOCK with argument data address */
		SDIO_CmdInitStructure.SDIO_Argument = (u32)addr;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_READ_MULT_BLOCK;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SDIO_READ_MULT_BLOCK);

		if (errorstatus != SD_OK)
		{
			return(errorstatus);
		}

		if (DeviceMode == SD_POLLING_MODE)
		{
			/* Polling mode */
			while (!(SDIO->STA &(SDIO_FLAG_RXOVERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DATAEND | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_STBITERR)))
			{
				if (SDIO_GetFlagStatus(SDIO_FLAG_RXFIFOHF) != RESET)
				{
					for (count = 0; count < SD_HALFFIFO; count++)
					{
						*(tempbuff + count) = SDIO_ReadData();
					}
					tempbuff += SD_HALFFIFO;
				}
			}

			if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET)
			{
				SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT);
				errorstatus = SD_DATA_TIMEOUT;
				return(errorstatus);
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET)
			{
				SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL);
				errorstatus = SD_DATA_CRC_FAIL;
				return(errorstatus);
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET)
			{
				SDIO_ClearFlag(SDIO_FLAG_RXOVERR);
				errorstatus = SD_RX_OVERRUN;
				return(errorstatus);
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET)
			{
				SDIO_ClearFlag(SDIO_FLAG_STBITERR);
				errorstatus = SD_START_BIT_ERR;
				return(errorstatus);
			}
			while (SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET)
			{
				*tempbuff = SDIO_ReadData();
				tempbuff++;
			}

			if (SDIO_GetFlagStatus(SDIO_FLAG_DATAEND) != RESET)
			{
				/* In Case Of SD-CARD Send Command STOP_TRANSMISSION */
				if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType))
				{
					/* Send CMD12 STOP_TRANSMISSION */
					SDIO_CmdInitStructure.SDIO_Argument = 0x0;
					SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_STOP_TRANSMISSION;
					SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
					SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
					SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
					SDIO_SendCommand(&SDIO_CmdInitStructure);

					errorstatus = CmdResp1Error(SDIO_STOP_TRANSMISSION);

					if (errorstatus != SD_OK)
					{
						return(errorstatus);
					}
				}
			}
			/* Clear all the static flags */
			SDIO_ClearFlag(SDIO_STATIC_FLAGS);
		}
		else if (DeviceMode == SD_INTERRUPT_MODE)
		{
			SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_RXFIFOHF | SDIO_IT_STBITERR, ENABLE);
			while ((TransferEnd == 0) && (TransferError == SD_OK))
			{
			}
			if (TransferError != SD_OK)
			{
				return(TransferError);
			}
		}
		else if (DeviceMode == SD_DMA_MODE)
		{
			SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR, ENABLE);
			SDIO_DMACmd(ENABLE);
			DMA_RxConfiguration(readbuff, (NumberOfBlocks * BlockSize));
			while (DMA_GetFlagStatus(DMA2_FLAG_TC4) == RESET)
			{
			}
			while ((TransferEnd == 0) && (TransferError == SD_OK))
			{
			}
			if (TransferError != SD_OK)
			{
				return(TransferError);
			}
		}
	}
	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_WriteBlock
* Description    : Allows to write one block starting from a specified address
*                  in a card.
* Input          : - addr: Address from where data are to be read.
*                  - writebuff: pointer to the buffer that contain the data to be
*                    transferred.
*                  - BlockSize: the SD card Data block size.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_WriteBlock(u32 addr, u32 *writebuff, u16 BlockSize)
{
	SD_Error errorstatus = SD_OK;
	u8  power = 0, cardstate = 0;
	u32 timeout = 0, bytestransferred = 0;
	u32 cardstatus = 0, count = 0, restwords = 0;
	u32 *tempbuff = writebuff;

	if (writebuff == NULL)
	{
		errorstatus = SD_INVALID_PARAMETER;
		return(errorstatus);
	}

	TransferError = SD_OK;
	TransferEnd = 0;
	TotalNumberOfBytes = 0;

	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DataLength = 0;
	SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_1b;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Disable;
	SDIO_DataConfig(&SDIO_DataInitStructure);
	SDIO_DMACmd(DISABLE);

	if (SDIO_GetResponse(SDIO_RESP1) & SD_CARD_LOCKED)
	{
		errorstatus = SD_LOCK_UNLOCK_FAILED;
		return(errorstatus);
	}

	if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
	{
		BlockSize = 512;
		addr /= 512;
	}

	/* Set the block size, both on controller and card */
	if ((BlockSize > 0) && (BlockSize <= 2048) && ((BlockSize & (BlockSize - 1)) == 0))
	{
		power = convert_from_bytes_to_power_of_two(BlockSize);

		SDIO_CmdInitStructure.SDIO_Argument = (u32)BlockSize;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_BLOCKLEN;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SDIO_SET_BLOCKLEN);

		if (errorstatus != SD_OK)
		{
			return(errorstatus);
		}
	}
	else
	{
		errorstatus = SD_INVALID_PARAMETER;
		return(errorstatus);
	}

	/* Wait till card is ready for data Added */
	SDIO_CmdInitStructure.SDIO_Argument = (u32)(RCA << 16);
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_STATUS;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SDIO_SEND_STATUS);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}

	cardstatus = SDIO_GetResponse(SDIO_RESP1);

	timeout = SD_DATATIMEOUT;

	while (((cardstatus & 0x00000100) == 0) && (timeout > 0))
	{
		timeout--;
		SDIO_CmdInitStructure.SDIO_Argument = (u32)(RCA << 16);
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_STATUS;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SDIO_SEND_STATUS);

		if (errorstatus != SD_OK)
		{
			return(errorstatus);
		}
		cardstatus = SDIO_GetResponse(SDIO_RESP1);
	}

	if (timeout == 0)
	{
		return(SD_ERROR);
	}

	/* Send CMD24 WRITE_SINGLE_BLOCK */
	SDIO_CmdInitStructure.SDIO_Argument = addr;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_WRITE_SINGLE_BLOCK;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SDIO_WRITE_SINGLE_BLOCK);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}

	TotalNumberOfBytes = BlockSize;
	StopCondition = 0;
	SrcBuffer = writebuff;

	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DataLength = BlockSize;
	SDIO_DataInitStructure.SDIO_DataBlockSize = (u32)power << 4;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
	SDIO_DataConfig(&SDIO_DataInitStructure);

	/* In case of single data block transfer no need of stop command at all */
	if (DeviceMode == SD_POLLING_MODE)
	{
		while (!(SDIO->STA & (SDIO_FLAG_DBCKEND | SDIO_FLAG_TXUNDERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_STBITERR)))
		{
			if (SDIO_GetFlagStatus(SDIO_FLAG_TXFIFOHE) != RESET)
			{
				if ((TotalNumberOfBytes - bytestransferred) < 32)
				{
					restwords = ((TotalNumberOfBytes - bytestransferred) % 4 == 0) ? ((TotalNumberOfBytes - bytestransferred) / 4) : ((TotalNumberOfBytes - bytestransferred) / 4 + 1);

					for (count = 0; count < restwords; count++, tempbuff++, bytestransferred += 4)
					{
						SDIO_WriteData(*tempbuff);
					}
				}
				else
				{
					for (count = 0; count < 8; count++)
					{
						SDIO_WriteData(*(tempbuff + count));
					}
					tempbuff += 8;
					bytestransferred += 32;
				}
			}
		}
		if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET)
		{
			SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT);
			errorstatus = SD_DATA_TIMEOUT;
			return(errorstatus);
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET)
		{
			SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL);
			errorstatus = SD_DATA_CRC_FAIL;
			return(errorstatus);
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_TXUNDERR) != RESET)
		{
			SDIO_ClearFlag(SDIO_FLAG_TXUNDERR);
			errorstatus = SD_TX_UNDERRUN;
			return(errorstatus);
		}
		else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET)
		{
			SDIO_ClearFlag(SDIO_FLAG_STBITERR);
			errorstatus = SD_START_BIT_ERR;
			return(errorstatus);
		}
	}
	else if (DeviceMode == SD_INTERRUPT_MODE)
	{
		SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_FLAG_TXFIFOHE | SDIO_IT_TXUNDERR | SDIO_IT_STBITERR, ENABLE);
		while ((TransferEnd == 0) && (TransferError == SD_OK))
		{
		}
		if (TransferError != SD_OK)
		{
			return(TransferError);
		}
	}
	else if (DeviceMode == SD_DMA_MODE)
	{
		SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_TXUNDERR | SDIO_IT_STBITERR, ENABLE);
		DMA_TxConfiguration(writebuff, BlockSize);
		SDIO_DMACmd(ENABLE);
		while (DMA_GetFlagStatus(DMA2_FLAG_TC4) == RESET)
		{
		}
		while ((TransferEnd == 0) && (TransferError == SD_OK))
		{
		}
		if (TransferError != SD_OK)
		{
			return(TransferError);
		}
	}

	/* Clear all the static flags */
	SDIO_ClearFlag(SDIO_STATIC_FLAGS);

	/* Wait till the card is in programming state */
	errorstatus = IsCardProgramming(&cardstate);

	while ((errorstatus == SD_OK) && ((cardstate == SD_CARD_PROGRAMMING) || (cardstate == SD_CARD_RECEIVING)))
	{
		errorstatus = IsCardProgramming(&cardstate);
	}

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_WriteMultiBlocks
* Description    : Allows to write blocks starting from a specified address in
*                  a card.
* Input          : - addr: Address from where data are to be read.
*                  - writebuff: pointer to the buffer that contain the data to be
*                    transferred.
*                  - BlockSize: the SD card Data block size.
*                  - NumberOfBlocks: number of blocks to be written.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_WriteMultiBlocks(u32 addr, u32 *writebuff, u16 BlockSize, u32 NumberOfBlocks)
{
	SD_Error errorstatus = SD_OK;
	u8  power = 0, cardstate = 0;
	u32 bytestransferred = 0;
	u32 count = 0, restwords = 0;
	u32 *tempbuff = writebuff;

	if (writebuff == NULL)
	{
		errorstatus = SD_INVALID_PARAMETER;
		return(errorstatus);
	}

	TransferError = SD_OK;
	TransferEnd = 0;
	TotalNumberOfBytes = 0;

	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DataLength = 0;
	SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_1b;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Disable;
	SDIO_DataConfig(&SDIO_DataInitStructure);
	SDIO_DMACmd(DISABLE);

	if (SDIO_GetResponse(SDIO_RESP1) & SD_CARD_LOCKED)
	{
		errorstatus = SD_LOCK_UNLOCK_FAILED;
		return(errorstatus);
	}

	if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
	{
		BlockSize = 512;
		addr /= 512;
	}

	/* Set the block size, both on controller and card */
	if ((BlockSize > 0) && (BlockSize <= 2048) && ((BlockSize & (BlockSize - 1)) == 0))
	{
		power = convert_from_bytes_to_power_of_two(BlockSize);

		SDIO_CmdInitStructure.SDIO_Argument = (u32)BlockSize;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_BLOCKLEN;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SDIO_SET_BLOCKLEN);
		SD_step = __LINE__;
		if (errorstatus != SD_OK)
		{
			return(errorstatus);
		}
	}
	else
	{
		errorstatus = SD_INVALID_PARAMETER;
		return(errorstatus);
	}

	/* Wait till card is ready for data Added */
	SDIO_CmdInitStructure.SDIO_Argument = (u32)(RCA << 16);
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_STATUS;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SDIO_SEND_STATUS);
	SD_step = __LINE__;

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}

	if (NumberOfBlocks > 1)
	{
		/* Common to all modes */
		if (NumberOfBlocks * BlockSize > SD_MAX_DATA_LENGTH)
		{
			errorstatus = SD_INVALID_PARAMETER;
			return(errorstatus);
		}

		if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
		{
			/* To improve performance */
			SDIO_CmdInitStructure.SDIO_Argument = (u32)(RCA << 16);
			SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);


			errorstatus = CmdResp1Error(SDIO_APP_CMD);
			SD_step = __LINE__;

			if (errorstatus != SD_OK)
			{
				return(errorstatus);
			}
			/* To improve performance */
			SDIO_CmdInitStructure.SDIO_Argument = (u32)NumberOfBlocks;
			SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_BLOCK_COUNT;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);

			errorstatus = CmdResp1Error(SDIO_SET_BLOCK_COUNT);
			SD_step = __LINE__;

			if (errorstatus != SD_OK)
			{
				return(errorstatus);
			}
		}

		/* Send CMD25 WRITE_MULT_BLOCK with argument data address */
		SDIO_CmdInitStructure.SDIO_Argument = (u32)addr;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_WRITE_MULT_BLOCK;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SDIO_WRITE_MULT_BLOCK);
		SD_step = __LINE__;

		if (SD_OK != errorstatus)
		{
			return(errorstatus);
		}

		TotalNumberOfBytes = NumberOfBlocks * BlockSize;
		StopCondition = 1;
		SrcBuffer = writebuff;

		SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
		SDIO_DataInitStructure.SDIO_DataLength = NumberOfBlocks * BlockSize;
		SDIO_DataInitStructure.SDIO_DataBlockSize = (u32)power << 4;
		SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
		SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
		SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
		SDIO_DataConfig(&SDIO_DataInitStructure);

		if (DeviceMode == SD_POLLING_MODE)
		{
			while (!(SDIO->STA & (SDIO_FLAG_TXUNDERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DATAEND | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_STBITERR)))
			{
				if (SDIO_GetFlagStatus(SDIO_FLAG_TXFIFOHE) != RESET)
				{
					if (!((TotalNumberOfBytes - bytestransferred) < SD_HALFFIFOBYTES))
					{
						for (count = 0; count < SD_HALFFIFO; count++)
						{
							SDIO_WriteData(*(tempbuff + count));
						}
						tempbuff += SD_HALFFIFO;
						bytestransferred += SD_HALFFIFOBYTES;
					}
					else
					{
						restwords = ((TotalNumberOfBytes - bytestransferred) % 4 == 0) ? ((TotalNumberOfBytes - bytestransferred) / 4) :
							((TotalNumberOfBytes - bytestransferred) / 4 + 1);

						for (count = 0; count < restwords; count++, tempbuff++, bytestransferred += 4)
						{
							SDIO_WriteData(*tempbuff);
						}
					}
				}
			}

			if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET)
			{
				SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT);
				SD_step = __LINE__;
				errorstatus = SD_DATA_TIMEOUT;
				return(errorstatus);
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET)
			{
				SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL);
				errorstatus = SD_DATA_CRC_FAIL;
				return(errorstatus);
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_TXUNDERR) != RESET)
			{
				SDIO_ClearFlag(SDIO_FLAG_TXUNDERR);
				errorstatus = SD_TX_UNDERRUN;
				return(errorstatus);
			}
			else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET)
			{
				SDIO_ClearFlag(SDIO_FLAG_STBITERR);
				errorstatus = SD_START_BIT_ERR;
				return(errorstatus);
			}

			if (SDIO_GetFlagStatus(SDIO_FLAG_DATAEND) != RESET)
			{
				if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
				{
					/* Send CMD12 STOP_TRANSMISSION */
					SDIO_CmdInitStructure.SDIO_Argument = 0x0;
					SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_STOP_TRANSMISSION;
					SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
					SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
					SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
					SDIO_SendCommand(&SDIO_CmdInitStructure);


					errorstatus = CmdResp1Error(SDIO_STOP_TRANSMISSION);
					SD_step = __LINE__;

					if (errorstatus != SD_OK)
					{
						return(errorstatus);
					}
				}
			}
		}
		else if (DeviceMode == SD_INTERRUPT_MODE)
		{
			SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_TXFIFOHE | SDIO_IT_TXUNDERR | SDIO_IT_STBITERR, ENABLE);
			while ((TransferEnd == 0) && (TransferError == SD_OK))
			{
			}
			if (TransferError != SD_OK)
			{
				return(TransferError);
			}
		}
		else if (DeviceMode == SD_DMA_MODE)
		{
			SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_TXUNDERR | SDIO_IT_STBITERR, ENABLE);
			SDIO_DMACmd(ENABLE);
			DMA_TxConfiguration(writebuff, (NumberOfBlocks * BlockSize));
			while (DMA_GetFlagStatus(DMA2_FLAG_TC4) == RESET)
			{
			}
			while ((TransferEnd == 0) && (TransferError == SD_OK))
			{
			}
			if (TransferError != SD_OK)
			{
				return(TransferError);
			}
		}
	}
	/* Clear all the static flags */
	SDIO_ClearFlag(SDIO_STATIC_FLAGS);

	/* Wait till the card is in programming state */
	errorstatus = IsCardProgramming(&cardstate);

	while ((errorstatus == SD_OK) && ((cardstate == SD_CARD_PROGRAMMING) || (cardstate == SD_CARD_RECEIVING)))
	{
		errorstatus = IsCardProgramming(&cardstate);
		SD_step = __LINE__;
	}

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_GetTransferState
* Description    : Gets the cuurent data transfer state.
* Input          : None
* Output         : None
* Return         : SDTransferState: Data Transfer state.
*                  This value can be:
*                   - SD_NO_TRANSFER: No data transfer is acting
*                   - SD_TRANSFER_IN_PROGRESS: Data transfer is acting
*******************************************************************************/
SDTransferState SD_GetTransferState(void)
{
	if (SDIO->STA & (SDIO_FLAG_TXACT | SDIO_FLAG_RXACT))
	{
		return(SD_TRANSFER_IN_PROGRESS);
	}
	else
	{
		return(SD_NO_TRANSFER);
	}
}

/*******************************************************************************
* Function Name  : SD_StopTransfer
* Description    : Aborts an ongoing data transfer.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_StopTransfer(void)
{
	SD_Error errorstatus = SD_OK;

	/* Send CMD12 STOP_TRANSMISSION  */
	SDIO_CmdInitStructure.SDIO_Argument = 0x0;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_STOP_TRANSMISSION;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SDIO_STOP_TRANSMISSION);

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_Erase
* Description    : Allows to erase memory area specified for the given card.
* Input          : - startaddr: the start address.
*                  - endaddr: the end address.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_Erase(u32 startaddr, u32 endaddr)
{
	SD_Error errorstatus = SD_OK;
	u32 delay = 0;
	vu32 maxdelay = 0;
	u8 cardstate = 0;

	/* Check if the card coomnd class supports erase command */
	if (((CSD_Tab[1] >> 20) & SD_CCCC_ERASE) == 0)
	{
		errorstatus = SD_REQUEST_NOT_APPLICABLE;
		return(errorstatus);
	}

	maxdelay = 72000 / ((SDIO->CLKCR & 0xFF) + 2);

	if (SDIO_GetResponse(SDIO_RESP1) & SD_CARD_LOCKED)
	{
		errorstatus = SD_LOCK_UNLOCK_FAILED;
		return(errorstatus);
	}

	if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
	{
		startaddr /= 512;
		endaddr /= 512;
	}

	/* According to sd-card spec 1.0 ERASE_GROUP_START (CMD32) and erase_group_end(CMD33) */
	if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
	{
		/* Send CMD32 SD_ERASE_GRP_START with argument as addr  */
		SDIO_CmdInitStructure.SDIO_Argument = startaddr;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SD_ERASE_GRP_START;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SDIO_SD_ERASE_GRP_START);
		if (errorstatus != SD_OK)
		{
			return(errorstatus);
		}

		/* Send CMD33 SD_ERASE_GRP_END with argument as addr  */
		SDIO_CmdInitStructure.SDIO_Argument = endaddr;
		SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SD_ERASE_GRP_END;
		SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
		SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
		SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
		SDIO_SendCommand(&SDIO_CmdInitStructure);

		errorstatus = CmdResp1Error(SDIO_SD_ERASE_GRP_END);
		if (errorstatus != SD_OK)
		{
			return(errorstatus);
		}
	}

	/* Send CMD38 ERASE */
	SDIO_CmdInitStructure.SDIO_Argument = 0;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_ERASE;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SDIO_ERASE);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}

	for (delay = 0; delay < maxdelay; delay++)
	{
	}

	/* Wait till the card is in programming state */
	errorstatus = IsCardProgramming(&cardstate);

	while ((errorstatus == SD_OK) && ((SD_CARD_PROGRAMMING == cardstate) || (SD_CARD_RECEIVING == cardstate)))
	{
		errorstatus = IsCardProgramming(&cardstate);
	}

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_SendStatus
* Description    : Returns the current card's status.
* Input          : pcardstatus: pointer to the buffer that will contain the SD
*                  card status (Card Status register).
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_SendStatus(u32 *pcardstatus)
{
	SD_Error errorstatus = SD_OK;

	if (pcardstatus == NULL)
	{
		errorstatus = SD_INVALID_PARAMETER;
		return(errorstatus);
	}

	SDIO_CmdInitStructure.SDIO_Argument = (u32)RCA << 16;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_STATUS;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);


	errorstatus = CmdResp1Error(SDIO_SEND_STATUS);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}

	*pcardstatus = SDIO_GetResponse(SDIO_RESP1);

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_SendSDStatus
* Description    : Returns the current SD card's status.
* Input          : psdstatus: pointer to the buffer that will contain the SD
*                  card status (SD Status register).
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_SendSDStatus(u32 *psdstatus)
{
	SD_Error errorstatus = SD_OK;
	u32 count = 0;

	if (SDIO_GetResponse(SDIO_RESP1) & SD_CARD_LOCKED)
	{
		errorstatus = SD_LOCK_UNLOCK_FAILED;
		return(errorstatus);
	}

	/* Set block size for card if it is not equal to current block size for card. */
	SDIO_CmdInitStructure.SDIO_Argument = 64;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_BLOCKLEN;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SDIO_SET_BLOCKLEN);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}

	/* CMD55 */
	SDIO_CmdInitStructure.SDIO_Argument = (u32)RCA << 16;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);
	errorstatus = CmdResp1Error(SDIO_APP_CMD);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}

	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DataLength = 64;
	SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_64b;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToSDIO;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
	SDIO_DataConfig(&SDIO_DataInitStructure);


	/* Send ACMD13 SD_APP_STAUS  with argument as card's RCA.*/
	SDIO_CmdInitStructure.SDIO_Argument = 0;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SD_APP_STAUS;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);
	errorstatus = CmdResp1Error(SDIO_SD_APP_STAUS);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}

	while (!(SDIO->STA &(SDIO_FLAG_RXOVERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_DBCKEND | SDIO_FLAG_STBITERR)))
	{
		if (SDIO_GetFlagStatus(SDIO_FLAG_RXFIFOHF) != RESET)
		{
			for (count = 0; count < 8; count++)
			{
				*(psdstatus + count) = SDIO_ReadData();
			}
			psdstatus += 8;
		}
	}

	if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET)
	{
		SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT);
		errorstatus = SD_DATA_TIMEOUT;
		return(errorstatus);
	}
	else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET)
	{
		SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL);
		errorstatus = SD_DATA_CRC_FAIL;
		return(errorstatus);
	}
	else if (SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET)
	{
		SDIO_ClearFlag(SDIO_FLAG_RXOVERR);
		errorstatus = SD_RX_OVERRUN;
		return(errorstatus);
	}
	else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET)
	{
		SDIO_ClearFlag(SDIO_FLAG_STBITERR);
		errorstatus = SD_START_BIT_ERR;
		return(errorstatus);
	}

	while (SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET)
	{
		*psdstatus = SDIO_ReadData();
		psdstatus++;
	}

	/* Clear all the static status flags*/
	SDIO_ClearFlag(SDIO_STATIC_FLAGS);
	psdstatus -= 16;
	for (count = 0; count < 16; count++)
	{
		psdstatus[count] = ((psdstatus[count] & SD_0TO7BITS) << 24) | ((psdstatus[count] & SD_8TO15BITS) << 8) |
			((psdstatus[count] & SD_16TO23BITS) >> 8) | ((psdstatus[count] & SD_24TO31BITS) >> 24);
	}
	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_ProcessIRQSrc
* Description    : Allows to process all the interrupts that are high.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_ProcessIRQSrc(void)
{
	u32 count = 0, restwords = 0;

	if (DeviceMode == SD_INTERRUPT_MODE)
	{
		if (SDIO_GetITStatus(SDIO_IT_RXFIFOHF) != RESET)
		{
			for (count = 0; count < SD_HALFFIFO; count++)
			{
				*(DestBuffer + count) = SDIO_ReadData();
			}
			DestBuffer += SD_HALFFIFO;
			NumberOfBytes += SD_HALFFIFOBYTES;
		}
		else if (SDIO_GetITStatus(SDIO_IT_TXFIFOHE) != RESET)
		{
			if ((TotalNumberOfBytes - NumberOfBytes) < SD_HALFFIFOBYTES)
			{
				restwords = ((TotalNumberOfBytes - NumberOfBytes) % 4 == 0) ?
					((TotalNumberOfBytes - NumberOfBytes) / 4) :
					((TotalNumberOfBytes - NumberOfBytes) / 4 + 1);

				for (count = 0; count < restwords; count++, SrcBuffer++, NumberOfBytes += 4)
				{
					SDIO_WriteData(*SrcBuffer);
				}
			}
			else
			{
				for (count = 0; count < SD_HALFFIFO; count++)
				{
					SDIO_WriteData(*(SrcBuffer + count));
				}

				SrcBuffer += SD_HALFFIFO;
				NumberOfBytes += SD_HALFFIFOBYTES;
			}
		}
	}

	if (SDIO_GetITStatus(SDIO_IT_DATAEND) != RESET)
	{
		if (DeviceMode != SD_DMA_MODE)
		{
			while ((SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET) && (NumberOfBytes < TotalNumberOfBytes))
			{
				*DestBuffer = SDIO_ReadData();
				DestBuffer++;
				NumberOfBytes += 4;
			}
		}

		if (StopCondition == 1)
		{
			TransferError = SD_StopTransfer();
		}
		else
		{
			TransferError = SD_OK;
		}
		SDIO_ClearITPendingBit(SDIO_IT_DATAEND);
		SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND |
			SDIO_IT_TXFIFOHE | SDIO_IT_RXFIFOHF | SDIO_IT_TXUNDERR |
			SDIO_IT_RXOVERR | SDIO_IT_STBITERR, DISABLE);
		TransferEnd = 1;
		NumberOfBytes = 0;
		return(TransferError);
	}

	if (SDIO_GetITStatus(SDIO_IT_DCRCFAIL) != RESET)
	{
		SDIO_ClearITPendingBit(SDIO_IT_DCRCFAIL);
		SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND |
			SDIO_IT_TXFIFOHE | SDIO_IT_RXFIFOHF | SDIO_IT_TXUNDERR |
			SDIO_IT_RXOVERR | SDIO_IT_STBITERR, DISABLE);
		NumberOfBytes = 0;
		TransferError = SD_DATA_CRC_FAIL;
		return(SD_DATA_CRC_FAIL);
	}

	if (SDIO_GetITStatus(SDIO_IT_DTIMEOUT) != RESET)
	{
		SDIO_ClearITPendingBit(SDIO_IT_DTIMEOUT);
		SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND |
			SDIO_IT_TXFIFOHE | SDIO_IT_RXFIFOHF | SDIO_IT_TXUNDERR |
			SDIO_IT_RXOVERR | SDIO_IT_STBITERR, DISABLE);
		NumberOfBytes = 0;
		TransferError = SD_DATA_TIMEOUT;
		return(SD_DATA_TIMEOUT);
	}

	if (SDIO_GetITStatus(SDIO_IT_RXOVERR) != RESET)
	{
		SDIO_ClearITPendingBit(SDIO_IT_RXOVERR);
		SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND |
			SDIO_IT_TXFIFOHE | SDIO_IT_RXFIFOHF | SDIO_IT_TXUNDERR |
			SDIO_IT_RXOVERR | SDIO_IT_STBITERR, DISABLE);
		NumberOfBytes = 0;
		TransferError = SD_RX_OVERRUN;
		return(SD_RX_OVERRUN);
	}

	if (SDIO_GetITStatus(SDIO_IT_TXUNDERR) != RESET)
	{
		SDIO_ClearITPendingBit(SDIO_IT_TXUNDERR);
		SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND |
			SDIO_IT_TXFIFOHE | SDIO_IT_RXFIFOHF | SDIO_IT_TXUNDERR |
			SDIO_IT_RXOVERR | SDIO_IT_STBITERR, DISABLE);
		NumberOfBytes = 0;
		TransferError = SD_TX_UNDERRUN;
		return(SD_TX_UNDERRUN);
	}

	if (SDIO_GetITStatus(SDIO_IT_STBITERR) != RESET)
	{
		SDIO_ClearITPendingBit(SDIO_IT_STBITERR);
		SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND |
			SDIO_IT_TXFIFOHE | SDIO_IT_RXFIFOHF | SDIO_IT_TXUNDERR |
			SDIO_IT_RXOVERR | SDIO_IT_STBITERR, DISABLE);
		NumberOfBytes = 0;
		TransferError = SD_START_BIT_ERR;
		return(SD_START_BIT_ERR);
	}

	return(SD_OK);
}

/*******************************************************************************
* Function Name  : CmdError
* Description    : Checks for error conditions for CMD0.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
static SD_Error CmdError(void)
{
	SD_Error errorstatus = SD_OK;
	u32 timeout;

	timeout = SDIO_CMD0TIMEOUT; /* 10000 */

	while ((timeout > 0) && (SDIO_GetFlagStatus(SDIO_FLAG_CMDSENT) == RESET))
	{
		timeout--;
	}

	if (timeout == 0)
	{
		errorstatus = SD_CMD_RSP_TIMEOUT;
		return(errorstatus);
	}

	/* Clear all the static flags */
	SDIO_ClearFlag(SDIO_STATIC_FLAGS);

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : CmdResp7Error
* Description    : Checks for error conditions for R7.
*                  response.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
static SD_Error CmdResp7Error(void)
{
	SD_Error errorstatus = SD_OK;
	u32 status;
	u32 timeout = SDIO_CMD0TIMEOUT;

	status = SDIO->STA;

	while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CMDREND | SDIO_FLAG_CTIMEOUT)) && (timeout > 0))
	{
		timeout--;
		status = SDIO->STA;
	}

	if ((timeout == 0) || (status & SDIO_FLAG_CTIMEOUT))
	{
		/* Card is not V2.0 complient or card does not support the set voltage range */
		errorstatus = SD_CMD_RSP_TIMEOUT;
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
		return(errorstatus);
	}

	if (status & SDIO_FLAG_CMDREND)
	{
		/* Card is SD V2.0 compliant */
		errorstatus = SD_OK;
		SDIO_ClearFlag(SDIO_FLAG_CMDREND);
		return(errorstatus);
	}
	return(errorstatus);
}

/*******************************************************************************
* Function Name  : CmdResp1Error
* Description    : Checks for error conditions for R1.
*                  response
* Input          : cmd: The sent command index.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
static SD_Error CmdResp1Error(u8 cmd)
{
	SD_Error errorstatus = SD_OK;
	u32 status;
	u32 response_r1;

	status = SDIO->STA;

	while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CMDREND | SDIO_FLAG_CTIMEOUT)))
	{
		status = SDIO->STA;
	}

	if (status & SDIO_FLAG_CTIMEOUT)
	{
		errorstatus = SD_CMD_RSP_TIMEOUT;
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
		return(errorstatus);
	}
	else if (status & SDIO_FLAG_CCRCFAIL)
	{
		errorstatus = SD_CMD_CRC_FAIL;
		SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL);
		return(errorstatus);
	}

	/* Check response received is of desired command */
	if (SDIO_GetCommandResponse() != cmd)
	{
		errorstatus = SD_ILLEGAL_CMD;
		return(errorstatus);
	}

	/* Clear all the static flags */
	SDIO_ClearFlag(SDIO_STATIC_FLAGS);

	/* We have received response, retrieve it for analysis  */
	response_r1 = SDIO_GetResponse(SDIO_RESP1);

	if ((response_r1 & SD_OCR_ERRORBITS) == SD_ALLZERO)
	{
		return(errorstatus);
	}

	if (response_r1 & SD_OCR_ADDR_OUT_OF_RANGE)
	{
		return(SD_ADDR_OUT_OF_RANGE);
	}

	if (response_r1 & SD_OCR_ADDR_MISALIGNED)
	{
		return(SD_ADDR_MISALIGNED);
	}

	if (response_r1 & SD_OCR_BLOCK_LEN_ERR)
	{
		return(SD_BLOCK_LEN_ERR);
	}

	if (response_r1 & SD_OCR_ERASE_SEQ_ERR)
	{
		return(SD_ERASE_SEQ_ERR);
	}

	if (response_r1 & SD_OCR_BAD_ERASE_PARAM)
	{
		return(SD_BAD_ERASE_PARAM);
	}

	if (response_r1 & SD_OCR_WRITE_PROT_VIOLATION)
	{
		return(SD_WRITE_PROT_VIOLATION);
	}

	if (response_r1 & SD_OCR_LOCK_UNLOCK_FAILED)
	{
		return(SD_LOCK_UNLOCK_FAILED);
	}

	if (response_r1 & SD_OCR_COM_CRC_FAILED)
	{
		return(SD_COM_CRC_FAILED);
	}

	if (response_r1 & SD_OCR_ILLEGAL_CMD)
	{
		return(SD_ILLEGAL_CMD);
	}

	if (response_r1 & SD_OCR_CARD_ECC_FAILED)
	{
		return(SD_CARD_ECC_FAILED);
	}

	if (response_r1 & SD_OCR_CC_ERROR)
	{
		return(SD_CC_ERROR);
	}

	if (response_r1 & SD_OCR_GENERAL_UNKNOWN_ERROR)
	{
		return(SD_GENERAL_UNKNOWN_ERROR);
	}

	if (response_r1 & SD_OCR_STREAM_READ_UNDERRUN)
	{
		return(SD_STREAM_READ_UNDERRUN);
	}

	if (response_r1 & SD_OCR_STREAM_WRITE_OVERRUN)
	{
		return(SD_STREAM_WRITE_OVERRUN);
	}

	if (response_r1 & SD_OCR_CID_CSD_OVERWRIETE)
	{
		return(SD_CID_CSD_OVERWRITE);
	}

	if (response_r1 & SD_OCR_WP_ERASE_SKIP)
	{
		return(SD_WP_ERASE_SKIP);
	}

	if (response_r1 & SD_OCR_CARD_ECC_DISABLED)
	{
		return(SD_CARD_ECC_DISABLED);
	}

	if (response_r1 & SD_OCR_ERASE_RESET)
	{
		return(SD_ERASE_RESET);
	}

	if (response_r1 & SD_OCR_AKE_SEQ_ERROR)
	{
		return(SD_AKE_SEQ_ERROR);
	}
	return(errorstatus);
}

/*******************************************************************************
* Function Name  : CmdResp3Error
* Description    : Checks for error conditions for R3 (OCR).
*                  response.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
static SD_Error CmdResp3Error(void)
{
	SD_Error errorstatus = SD_OK;
	u32 status;

	status = SDIO->STA;

	while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CMDREND | SDIO_FLAG_CTIMEOUT)))
	{
		status = SDIO->STA;
	}

	if (status & SDIO_FLAG_CTIMEOUT)
	{
		errorstatus = SD_CMD_RSP_TIMEOUT;
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
		return(errorstatus);
	}
	/* Clear all the static flags */
	SDIO_ClearFlag(SDIO_STATIC_FLAGS);
	return(errorstatus);
}

/*******************************************************************************
* Function Name  : CmdResp2Error
* Description    : Checks for error conditions for R2 (CID or CSD).
*                  response.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
static SD_Error CmdResp2Error(void)
{
	SD_Error errorstatus = SD_OK;
	u32 status;

	status = SDIO->STA;

	while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CTIMEOUT | SDIO_FLAG_CMDREND)))
	{
		status = SDIO->STA;
	}

	if (status & SDIO_FLAG_CTIMEOUT)
	{
		errorstatus = SD_CMD_RSP_TIMEOUT;
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
		return(errorstatus);
	}
	else if (status & SDIO_FLAG_CCRCFAIL)
	{
		errorstatus = SD_CMD_CRC_FAIL;
		SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL);
		return(errorstatus);
	}

	/* Clear all the static flags */
	SDIO_ClearFlag(SDIO_STATIC_FLAGS);

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : CmdResp6Error
* Description    : Checks for error conditions for R6 (RCA).
*                  response.
* Input          : - cmd: The sent command index.
*                  - prca: pointer to the variable that will contain the SD
*                    card relative address RCA.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
static SD_Error CmdResp6Error(u8 cmd, u16 *prca)
{
	SD_Error errorstatus = SD_OK;
	u32 status;
	u32 response_r1;

	status = SDIO->STA;

	while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CTIMEOUT | SDIO_FLAG_CMDREND)))
	{
		status = SDIO->STA;
	}

	if (status & SDIO_FLAG_CTIMEOUT)
	{
		errorstatus = SD_CMD_RSP_TIMEOUT;
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
		return(errorstatus);
	}
	else if (status & SDIO_FLAG_CCRCFAIL)
	{
		errorstatus = SD_CMD_CRC_FAIL;
		SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL);
		return(errorstatus);
	}

	/* Check response received is of desired command */
	if (SDIO_GetCommandResponse() != cmd)
	{
		errorstatus = SD_ILLEGAL_CMD;
		return(errorstatus);
	}

	/* Clear all the static flags */
	SDIO_ClearFlag(SDIO_STATIC_FLAGS);

	/* We have received response, retrieve it.  */
	response_r1 = SDIO_GetResponse(SDIO_RESP1);

	if (SD_ALLZERO == (response_r1 & (SD_R6_GENERAL_UNKNOWN_ERROR | SD_R6_ILLEGAL_CMD | SD_R6_COM_CRC_FAILED)))
	{
		*prca = (u16)(response_r1 >> 16);
		return(errorstatus);
	}

	if (response_r1 & SD_R6_GENERAL_UNKNOWN_ERROR)
	{
		return(SD_GENERAL_UNKNOWN_ERROR);
	}

	if (response_r1 & SD_R6_ILLEGAL_CMD)
	{
		return(SD_ILLEGAL_CMD);
	}

	if (response_r1 & SD_R6_COM_CRC_FAILED)
	{
		return(SD_COM_CRC_FAILED);
	}

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : SDEnWideBus
* Description    : Enables or disables the SDIO wide bus mode.
* Input          : NewState: new state of the SDIO wide bus mode.
*                  This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
static SD_Error SDEnWideBus(FunctionalState NewState)
{
	SD_Error errorstatus = SD_OK;

	u32 scr[2] = { 0, 0 };

	if (SDIO_GetResponse(SDIO_RESP1) & SD_CARD_LOCKED)
	{
		errorstatus = SD_LOCK_UNLOCK_FAILED;
		return(errorstatus);
	}

	/* Get SCR Register */
	errorstatus = FindSCR(RCA, scr);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}

	/* If wide bus operation to be enabled */
	if (NewState == ENABLE)
	{
		/* If requested card supports wide bus operation */
		if ((scr[1] & SD_WIDE_BUS_SUPPORT) != SD_ALLZERO)
		{
			/* Send CMD55 APP_CMD with argument as card's RCA.*/
			SDIO_CmdInitStructure.SDIO_Argument = (u32)RCA << 16;
			SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);

			errorstatus = CmdResp1Error(SDIO_APP_CMD);

			if (errorstatus != SD_OK)
			{
				return(errorstatus);
			}

			/* Send ACMD6 APP_CMD with argument as 2 for wide bus mode */
			SDIO_CmdInitStructure.SDIO_Argument = 0x2;
			SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_SD_SET_BUSWIDTH;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);

			errorstatus = CmdResp1Error(SDIO_APP_SD_SET_BUSWIDTH);

			if (errorstatus != SD_OK)
			{
				return(errorstatus);
			}
			return(errorstatus);
		}
		else
		{
			errorstatus = SD_REQUEST_NOT_APPLICABLE;
			return(errorstatus);
		}
	}   /* If wide bus operation to be disabled */
	else
	{
		/* If requested card supports 1 bit mode operation */
		if ((scr[1] & SD_SINGLE_BUS_SUPPORT) != SD_ALLZERO)
		{
			/* Send CMD55 APP_CMD with argument as card's RCA.*/
			SDIO_CmdInitStructure.SDIO_Argument = (u32)RCA << 16;
			SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);


			errorstatus = CmdResp1Error(SDIO_APP_CMD);

			if (errorstatus != SD_OK)
			{
				return(errorstatus);
			}

			/* Send ACMD6 APP_CMD with argument as 2 for wide bus mode */
			SDIO_CmdInitStructure.SDIO_Argument = 0x00;
			SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_SD_SET_BUSWIDTH;
			SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
			SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
			SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
			SDIO_SendCommand(&SDIO_CmdInitStructure);

			errorstatus = CmdResp1Error(SDIO_APP_SD_SET_BUSWIDTH);

			if (errorstatus != SD_OK)
			{
				return(errorstatus);
			}

			return(errorstatus);
		}
		else
		{
			errorstatus = SD_REQUEST_NOT_APPLICABLE;
			return(errorstatus);
		}
	}
}

/*******************************************************************************
* Function Name  : IsCardProgramming
* Description    : Checks if the SD card is in programming state.
* Input          : pstatus: pointer to the variable that will contain the SD
*                  card state.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
static SD_Error IsCardProgramming(u8 *pstatus)
{
	SD_Error errorstatus = SD_OK;
	vu32 respR1 = 0, status = 0;

	SDIO_CmdInitStructure.SDIO_Argument = (u32)RCA << 16;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_STATUS;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	status = SDIO->STA;
	while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CMDREND | SDIO_FLAG_CTIMEOUT)))
	{
		status = SDIO->STA;
	}

	if (status & SDIO_FLAG_CTIMEOUT)
	{
		errorstatus = SD_CMD_RSP_TIMEOUT;
		SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
		return(errorstatus);
	}
	else if (status & SDIO_FLAG_CCRCFAIL)
	{
		errorstatus = SD_CMD_CRC_FAIL;
		SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL);
		return(errorstatus);
	}

	status = (u32)SDIO_GetCommandResponse();

	/* Check response received is of desired command */
	if (status != SDIO_SEND_STATUS)
	{
		errorstatus = SD_ILLEGAL_CMD;
		return(errorstatus);
	}

	/* Clear all the static flags */
	SDIO_ClearFlag(SDIO_STATIC_FLAGS);


	/* We have received response, retrieve it for analysis  */
	respR1 = SDIO_GetResponse(SDIO_RESP1);

	/* Find out card status */
	*pstatus = (u8)((respR1 >> 9) & 0x0000000F);

	if ((respR1 & SD_OCR_ERRORBITS) == SD_ALLZERO)
	{
		return(errorstatus);
	}

	if (respR1 & SD_OCR_ADDR_OUT_OF_RANGE)
	{
		return(SD_ADDR_OUT_OF_RANGE);
	}

	if (respR1 & SD_OCR_ADDR_MISALIGNED)
	{
		return(SD_ADDR_MISALIGNED);
	}

	if (respR1 & SD_OCR_BLOCK_LEN_ERR)
	{
		return(SD_BLOCK_LEN_ERR);
	}

	if (respR1 & SD_OCR_ERASE_SEQ_ERR)
	{
		return(SD_ERASE_SEQ_ERR);
	}

	if (respR1 & SD_OCR_BAD_ERASE_PARAM)
	{
		return(SD_BAD_ERASE_PARAM);
	}

	if (respR1 & SD_OCR_WRITE_PROT_VIOLATION)
	{
		return(SD_WRITE_PROT_VIOLATION);
	}

	if (respR1 & SD_OCR_LOCK_UNLOCK_FAILED)
	{
		return(SD_LOCK_UNLOCK_FAILED);
	}

	if (respR1 & SD_OCR_COM_CRC_FAILED)
	{
		return(SD_COM_CRC_FAILED);
	}

	if (respR1 & SD_OCR_ILLEGAL_CMD)
	{
		return(SD_ILLEGAL_CMD);
	}

	if (respR1 & SD_OCR_CARD_ECC_FAILED)
	{
		return(SD_CARD_ECC_FAILED);
	}

	if (respR1 & SD_OCR_CC_ERROR)
	{
		return(SD_CC_ERROR);
	}

	if (respR1 & SD_OCR_GENERAL_UNKNOWN_ERROR)
	{
		return(SD_GENERAL_UNKNOWN_ERROR);
	}

	if (respR1 & SD_OCR_STREAM_READ_UNDERRUN)
	{
		return(SD_STREAM_READ_UNDERRUN);
	}

	if (respR1 & SD_OCR_STREAM_WRITE_OVERRUN)
	{
		return(SD_STREAM_WRITE_OVERRUN);
	}

	if (respR1 & SD_OCR_CID_CSD_OVERWRIETE)
	{
		return(SD_CID_CSD_OVERWRITE);
	}

	if (respR1 & SD_OCR_WP_ERASE_SKIP)
	{
		return(SD_WP_ERASE_SKIP);
	}

	if (respR1 & SD_OCR_CARD_ECC_DISABLED)
	{
		return(SD_CARD_ECC_DISABLED);
	}

	if (respR1 & SD_OCR_ERASE_RESET)
	{
		return(SD_ERASE_RESET);
	}

	if (respR1 & SD_OCR_AKE_SEQ_ERROR)
	{
		return(SD_AKE_SEQ_ERROR);
	}

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : FindSCR
* Description    : Find the SD card SCR register value.
* Input          : - rca: selected card address.
*                  - pscr: pointer to the buffer that will contain the SCR value.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
static SD_Error FindSCR(u16 rca, u32 *pscr)
{
	u32 index = 0;
	SD_Error errorstatus = SD_OK;
	u32 tempscr[2] = { 0, 0 };

	/* Set Block Size To 8 Bytes */
	/* Send CMD55 APP_CMD with argument as card's RCA */
	SDIO_CmdInitStructure.SDIO_Argument = (u32)8;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_BLOCKLEN;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SDIO_SET_BLOCKLEN);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}

	/* Send CMD55 APP_CMD with argument as card's RCA */
	SDIO_CmdInitStructure.SDIO_Argument = (u32)RCA << 16;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SDIO_APP_CMD);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}
	SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
	SDIO_DataInitStructure.SDIO_DataLength = 8;
	SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_8b;
	SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToSDIO;
	SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
	SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
	SDIO_DataConfig(&SDIO_DataInitStructure);


	/* Send ACMD51 SD_APP_SEND_SCR with argument as 0 */
	SDIO_CmdInitStructure.SDIO_Argument = 0x0;
	SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SD_APP_SEND_SCR;
	SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
	SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
	SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
	SDIO_SendCommand(&SDIO_CmdInitStructure);

	errorstatus = CmdResp1Error(SDIO_SD_APP_SEND_SCR);

	if (errorstatus != SD_OK)
	{
		return(errorstatus);
	}

	while (!(SDIO->STA & (SDIO_FLAG_RXOVERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_DBCKEND | SDIO_FLAG_STBITERR)))
	{
		if (SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET)
		{
			*(tempscr + index) = SDIO_ReadData();
			index++;
		}
	}

	if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET)
	{
		SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT);
		errorstatus = SD_DATA_TIMEOUT;
		return(errorstatus);
	}
	else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET)
	{
		SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL);
		errorstatus = SD_DATA_CRC_FAIL;
		return(errorstatus);
	}
	else if (SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET)
	{
		SDIO_ClearFlag(SDIO_FLAG_RXOVERR);
		errorstatus = SD_RX_OVERRUN;
		return(errorstatus);
	}
	else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET)
	{
		SDIO_ClearFlag(SDIO_FLAG_STBITERR);
		errorstatus = SD_START_BIT_ERR;
		return(errorstatus);
	}

	/* Clear all the static flags */
	SDIO_ClearFlag(SDIO_STATIC_FLAGS);

	*(pscr + 1) = ((tempscr[0] & SD_0TO7BITS) << 24) | ((tempscr[0] & SD_8TO15BITS) << 8) | ((tempscr[0] & SD_16TO23BITS) >> 8) | ((tempscr[0] & SD_24TO31BITS) >> 24);

	*(pscr) = ((tempscr[1] & SD_0TO7BITS) << 24) | ((tempscr[1] & SD_8TO15BITS) << 8) | ((tempscr[1] & SD_16TO23BITS) >> 8) | ((tempscr[1] & SD_24TO31BITS) >> 24);

	return(errorstatus);
}

/*******************************************************************************
* Function Name  : convert_from_bytes_to_power_of_two
* Description    : Converts the number of bytes in power of two and returns the
*                  power.
* Input          : NumberOfBytes: number of bytes.
* Output         : None
* Return         : None
*******************************************************************************/
static u8 convert_from_bytes_to_power_of_two(u16 NumberOfBytes)
{
	u8 count = 0;

	while (NumberOfBytes != 1)
	{
		NumberOfBytes >>= 1;
		count++;
	}
	return(count);
}

/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description    : Configures the SDIO Corresponding GPIO Ports
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Configuration(void)
{
	GPIO_InitTypeDef  GPIO_InitStructure;

	/* GPIOC and GPIOD Periph clock enable */
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD, ENABLE);

	GPIO_InitStructure.GPIO_Pin = SD_DATA_PINS;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_Init(SD_DATA_PORT, &GPIO_InitStructure);

	GPIO_InitStructure.GPIO_Pin = SD_CMD_PIN;
	GPIO_Init(SD_CMD_PORT, &GPIO_InitStructure);
}

/*******************************************************************************
* Function Name  : DMA_TxConfiguration
* Description    : Configures the DMA2 Channel4 for SDIO Tx request.
* Input          : - BufferSRC: pointer to the source buffer
*                  - BufferSize: buffer size
* Output         : None
* Return         : None
*******************************************************************************/
void DMA_TxConfiguration(u32 *BufferSRC, u32 BufferSize)
{
	DMA_InitTypeDef DMA_InitStructure;

	DMA_ClearFlag(DMA2_FLAG_TC4 | DMA2_FLAG_TE4 | DMA2_FLAG_HT4 | DMA2_FLAG_GL4);

	/* DMA2 Channel4 disable */
	DMA_Cmd(DMA2_Channel4, DISABLE);

	/* DMA2 Channel4 Config */
	DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)SDIO_FIFO_Address;
	DMA_InitStructure.DMA_MemoryBaseAddr = (u32)BufferSRC;
	DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
	DMA_InitStructure.DMA_BufferSize = BufferSize / 4;
	DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
	DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
	DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
	DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
	DMA_InitStructure.DMA_Priority = DMA_Priority_High;
	DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
	DMA_Init(DMA2_Channel4, &DMA_InitStructure);

	/* DMA2 Channel4 enable */
	DMA_Cmd(DMA2_Channel4, ENABLE);
}

/*******************************************************************************
* Function Name  : DMA_RxConfiguration
* Description    : Configures the DMA2 Channel4 for SDIO Rx request.
* Input          : - BufferDST: pointer to the destination buffer
*                  - BufferSize: buffer size
* Output         : None
* Return         : None
*******************************************************************************/
void DMA_RxConfiguration(u32 *BufferDST, u32 BufferSize)
{
	DMA_InitTypeDef DMA_InitStructure;

	DMA_ClearFlag(DMA2_FLAG_TC4 | DMA2_FLAG_TE4 | DMA2_FLAG_HT4 | DMA2_FLAG_GL4);

	/* DMA2 Channel4 disable */
	DMA_Cmd(DMA2_Channel4, DISABLE);

	/* DMA2 Channel4 Config */
	DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)SDIO_FIFO_Address;
	DMA_InitStructure.DMA_MemoryBaseAddr = (u32)BufferDST;
	DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
	DMA_InitStructure.DMA_BufferSize = BufferSize / 4;
	DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
	DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
	DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
	DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
	DMA_InitStructure.DMA_Priority = DMA_Priority_High;
	DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
	DMA_Init(DMA2_Channel4, &DMA_InitStructure);

	/* DMA2 Channel4 enable */
	DMA_Cmd(DMA2_Channel4, ENABLE);
}

#endif
